{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894740796",
    "entityType": "Track",
    "nonce": "0xc035b944c3c0e736086dfe89d68b6682a7b30e30c1009c72b0fa2c6176ac486d",
    "signature": "0xcbedb0b4bdfcb05720a43f918738b4f23f391cd2db3e50caafc241a4e8fa6ca34380ec7e75aef7525bcb50b67d08ba2ed3ee058a69b562b2e8441183776936841c",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}